Electric trolley



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No. 466,807. rPatented Jan. 12-4, 1892.

UNITED STATES PATENT OFFICE.

ELMER A. SPERRY, OF CHICAGO, ILLINOIS.

ELECTRICl TROLLEY.

SPECIFICATION forming part of Letters Patent No. d66,807,' dated January12, 1892.'.

' Application led June 24, 1891. Serial No. 397,299. (No model.)

To @ZZ whom t may concern.'

Beit known that I, ELMEE A. SPEEEY, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and` useful Improvement in Electric Trolleys, of whichthe following is a full, clear, and exact speciiicaion. i

My invention relates to trolleysfor electric, street, or other cars; andit consists in certain details of construction of the erecting-springfor the trolley and devices for controlling the rotation of the trolleyand trolley-pole.

Figure l shows a sectional view of the erecting-spring and device forrotating the trolleypole. Fig. 2 shows a detached view of portion ofsame. Fig. 3 shows side elevation of car with trolley-pole attached andalso the relation of the retractor.

Like letters of reference indicate similar parts through the severalviews.

'A base A, having a center at A', is secured to the car. Arranged uponthis base is a clamp I3 with cap B', which are secured together by boltsB. This clamp may be solidly secured to the base or pivotally arrangedthereon. The same is shown in Figs. l and 2. Interior to the clamp andintegral therewith is a flattened tongue C. The clamp B serves to securein an adjustable relation a spring C', into the other end of which isfastened a sleeve C. Loosely fitting this sleeve is a second sleeve D,into which is secured the trolley-pole D', carrying the trolley D, whichmay be of the usual construction. The interior rotating sleeve D isprovided with a plug E, secured thereto, flattened at its end, which isgrasped by links F and G. The pin G serves to secure the links to theplug E. These links. are held together by bolts G, running throughthimbles, which separat-e the same, so as to pass loosely over thetongue C.

The use and operation of my invention are as follows: In using a coilederecting-spring such as is shown I have found that when it is bent inopposite directions in the same plane the ilexure vtends to Irotate thetrolley in such a manner as to interferewith its operation in connectionwith the trolley-Wire. This I overcome in two ways: first, by allowingthe clamp in which the spring is supported to rotate and also by meanscausing the spring to dex in a single plane only. In the drawings I haveillustrated still a further method of getting rid of any extra strainswhich might exist, which consists in providing a separate rotating piececontrolled by the links F and G, into which piece the trolley-pole isinserted. It will readily be seen by Fig. 2 that the ilexure can takeplace only in the single plane, as shown in Fig. l. The adj ustabilityof the spring in the clamp B is to compensate for different hefts oftrolley and fixtures. In the case of alight trolley the spring should bepulled out, so that less convolutions are included in the clamp and moreutilized in the tlexure.

It will readily be understood that other means for retaining thealignment of the trolley with the car or preventing the rotative effectof a coiled erecting-spring interfering with the alignment of thetrolley may be used without interfering with the spirit of theinvention, and details of the retracting device can be greatly Variedwithout departing from the invention.

It must be seen that the spring is arranged to flex with the movement ofthe trolley-pole and contains mechanism for controlling the flexure ofthe spring within a single plane. It will readily be understood thatthis arrangement will operate with or without the swivel at the base andtop of the spring. The one at the base is to facilitate changing thetrolley upon changerof the direction in movement of the car, and theswivel at the top is to still further prevent the variations in rotativeeffect of the spring due to flexure interfering with the alignment ofthe trolley, as fully explained herein.

Although it is designed to use all these features in connection with oneanother, yet it is obvious that one or more of them may be used withoutthe others, and the invention extends to suchuse.

What I claim as new, and desire to secure by Letters Patent, is-

I. In an electric trolley, an upright flexing coiled erecting-spring anda trolley supported thereby, with a swivel-joint connection between thetrolley and the spring,'combined with a connection of the trolleyindependent IOO of the spring for preventing or controlling' therotation of the trolley with reference to the spring.

2. An upright flexing trolley erecting-spring, a trolley supported byone end of the spring, in combination with a horizontally-swiveling basefastened to the other end of the spring.

3. In an electric trolley, an upright flexing coiled erecting-spring, atrolley directed thereby, a base, and means whereby the spring may besecured to the base at Varying heights therein.

4. A comparatively short upright coiled iiexing erecting-spring, a poleand trolley supported at its upper end, and means whereby the spring isprevented from flexing in but a single plane, in combination With aswiveling base for the spring attached to its lower end.

5. An upright coiled liexingtrolleyerectingspringe, trolley supported'byone end, and a swiveling support for the other end of the spring, incombination with mechanism for confining the ileXure of the spring to asingle plane.

6. In an upright coiled flexing erectingspring, a trolley-pole supportedby one end, a head fixed to the other end of the spring, and a supportupon which the head rests by means of a swveling joint, in combinationwith mechanism att-ached to the head, adapted to confine the lexure ofthe spring Within asingle plane with reference to the head, while theWhole is allowed to move upon the swivel independent ot' the lexure ofthe spring.

ELMER A. SPERRY.

Witnesses:

P. J. MULDooN, M. NIELsoN.

